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ERW Carbon Steel Tube Mill

Tube Mill Machine Compose

Cold Roll Forming Machine

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Carbon Steel Coil Slitting Line

Steel Coil Cut To Length Line

Auxiliary Equipment And Spare Parts

16inch 406mm ERW Tube Mill

This production line adopts high-frequency induction welding and continuous roll forming to manufacture large-diameter carbon steel pipes. Widely used in pipelines, construction structures, bridge foundations, and port piling, it features FFX forming, heavy-duty sizing structure, quick roll-change modules, and centralized automation for stable, flexible, and high-capacity operation.

Product Details

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Product Details

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List of Equipment Supply

Coil Loading → Decoiling → Shear & Butt Welding → Floor-Type Loop Accumulator → Free Forming → HF Welding → Deburring → Spray Cooling → Sizing → Flying Saw Cutting → Straightening → Hydrostatic Testing → Oiling/Painting → Auto Bundling

Step	Function Description
1. Coil Car	Transfers steel coils from the ground to the uncoiler position using hydraulic drive; ensures safe loading.
2. Hydraulic Uncoiler	Expands and feeds the steel strip steadily with tension control, preparing it for forming.
3. Shear & Butt Welder	Shears the strip tail and welds the next coil head for uninterrupted strip feeding without stopping the line.
4. Floor-Type Accumulator	Temporarily stores steel strip during coil change to ensure continuous line operation.
5. Forming Mill	Gradually bends the flat strip into an open pipe shape using multiple forming roll stands.
6. High-Frequency Welder	Heats the strip edges by induction and forms a solid longitudinal weld through pressure squeezing.
7. Deburring Unit	Removes internal and external weld flash to improve the pipe’s surface quality and ensure safety.
8. Spray Cooling System	Rapidly cools the weld seam and entire pipe to control thermal deformation and stabilize dimensions.
9. Sizing Mill	Precisely calibrates the pipe’s diameter, roundness, and shape; supports round-to-square forming.
10. Flying Saw Cutter	Cuts pipes into preset lengths with real-time synchronization; supports hot saw, cold saw, or milling cutter.
11. Pipe Straightening Machine	Corrects axial deformation to improve straightness and prepare pipes for stacking or further processing.
12. Hydrostatic Tester	Pressurizes the pipe with water to verify sealing and pressure resistance, meeting API and structural standards.
13. Oiling / Painting System	Applies anti-rust oil or spray paint to enhance corrosion protection and appearance.
14. Automatic Stacker & Strapper	Automatically aligns, counts, stacks, and straps finished pipes for efficient packaging and logistics.

2. BASIC DESIGN DATA

Design of the proposed line is based on following specification:

Item	Specification
Pipe Diameter Range	Φ219mm – Φ406mm
Wall Thickness Range	4.0mm – 16.0mm
Steel Material Support	Q195–Q345, X42–X70, API 5L/5CT series
Strip Width Range	650mm – 1320mm
Forming Speed	3 – 15 m/min (adjustable by spec & grade)
HF Welder Power	600 – 1200kW (solid-state high-frequency)
Main Drive	Dual-motor synchronization with inverter control
Flying Saw Options	Hot saw / Cold saw / Milling cutter (servo-driven)
Sizing Accuracy	±0.5mm with auto adjust modules
Cutting Length Tolerance	±2mm
Total Installed Power	1000 – 1600 kW (depending on configuration)
Operator Requirement	6–8 persons/shift
Layout Size (Standard Line)	Approx. 85m × 8m

Forming & Sizing Section Configuration

- Forming System:
  - Shared Open Frames: 3 (FFX flexible forming)
  - Horizontal Stands: 9 (synchronous left-right roll design)
- Sizing System:
  - Universal Sizing Stands: 4
  - Turkish Heads: 3 (for fine adjustment and correction)
This setup supports fast roll change and high flexibility for multi-size production.

Finishing Auxiliary Equipment Description

Eddy current tester (inline weld defect detection)
Hydrostatic tester (max pressure: 25MPa)
Pipe straightening machine
Oiling/Painting system
Automatic stacking & strapping machine
Quick-change mold base + recipe memory system

Equipment Name	Function Description
Hydrostatic Tester	Up to 25MPa pressure test for pipe strength/sealing, auto water injection & drain
Eddy Current Tester	Online NDT for welds and pipe body to detect cracks, inclusions, or lack of fusion
Pipe Straightener	Corrects axial bending to ensure line shape and straightness
Oiling/Painting Unit	Applies protective oil or paint for corrosion resistance and improved appearance
Pipe End Chamfering Machine	Optional for beveling or API thread-end preparation

erw tube mill finishing section machine

Operating Procedure

Product Applications

- This line is suitable for manufacturing high-quality large-diameter pipes used in:
  - ✅ Oil & gas pipelines (API 5L)
  - ✅ Foundation piles, bridge piles, port structure pipes
  - ✅ Municipal water and drainage systems
  - ✅ Steel construction and heavy-duty structural tubing
  - ✅ Conduit and pressure pipes for industrial use

Looking for a complete understanding of ERW TUBE MILL technology? Read our Ultimate Guide to ERW TUBE MILL.

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16inch ERW tube Mill FAQs

Weak or inconsistent weld seam

Low HF power or misaligned strip edges,Adjust HF coil and impedance position, increase power

Dimensional deviation in pipe

FFX parameters not calibrated or roller offset, Recalibrate forming & sizing section using presets

Cutting length inaccuracy

Dull saw blade or servo mismatch ,Replace blade, re-synchronize flying saw encoder

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